diff --git a/lib/authentication/authenticationprovider.inc.php b/lib/authentication/authenticationprovider.inc.php
index e0830d5..7004af6 100644
--- a/lib/authentication/authenticationprovider.inc.php
+++ b/lib/authentication/authenticationprovider.inc.php
@@ -6,6 +6,8 @@ class KTAuthenticationProvider extends KTStandardDispatcher {
     var $sName;
     var $sNamespace;
     var $bHasSource = false;
+    var $bUserSource = true;
+    var $bGroupSource = false;
 
     function KTAuthenticationProvider() {
         return parent::KTStandardDispatcher();